Employee information stolen in October cyberattack: TTC memo

As many as 25,000 current and former TTC employees may have had their information stolen in ransomware attack

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TTC employees are being warned to keep an eye on their bank accounts after a cyberattack in October crippled a number of the transit agency’s key systems.


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An internal memo issued Monday said the investigation so far suggests the personal information of as many as 25,000 current and former TTC employees may have been compromised in the Oct. 29 hack.

“We continue to investigate whether a small number of customers or vendors may also be impacted and will notify these individuals when we have further information,” the memo said.

The TTC claims the compromised information may include names, addresses, and social insurance numbers.

Those impacted by the breach, added the memo, will be contacted directly.

TTC employees are being asked to immediately sign up for a credit monitoring service, and to notify their bank. A statement similar to the internal memo was released by the TTC Monday afternoon.


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The Oct. 29 ransomware attack brought down a number of TTC systems, including internal employee email, payroll, real-time route tracking, online booking for WheelTrans, and systems that allow transit control to monitor and communicate with surface vehicles.

Concerns over communication and safety triggered dozens of formal work refusals being filed with the Ontario Ministry of Labour .

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On Friday, TTC commissioners were provided with a confidential update during an emergency, in-camera meeting .

A statement from TTC CEO Rick Leary said there isn’t any evidence the information has been misused, and added that the hackers were part of an “extremely well-organized” enterprise.

“Over the coming weeks we will continue rebuilding the remaining impacted servers and internet services, like re-establishing external email capabilities,” Leary wrote.

“But in truth, and based on the experiences of other organizations, this could take some time.”

On Twitter:    @bryanpassifiume


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